006MARIUM. 61 



C. Quimbyii, Wood. 



Cells small, subelliptical, profoundly constricted in the 

 middle, joined by translucent bands into families; semi-cells 

 Been from tin- front elliptical, and nearly twice as long as broad ; 

 from the vertes elliptical, from the side roundish. < Ihlorophyl 

 mass* ingle in * -; t < - 1 1 cell. Cytioderm thin, smooth. 



1 diameter 18 .".: length 25 y. 



"This jilant was found in a Spring Dear Camden, N. J., 

 upon whose bottom it tunnel a gelatinous translucent, green- 

 ish mass. The cells are joined by bands into families, in 

 which tin- little parent cell is generally very distinct, it, or 

 rather the two cells into which it first divides, remaining in 

 the centre of the group." Wood, p. 36. 



I would Buggesl this to I"- eery Dear, or identical with 



( '. Hurt, mi, Kail's. 



C. tinctum, Ralfs. {Sphaerozoana tinctwn, Etab). Plate X\'l, 



fig. 31. 



Cells small, somewhat longer than broad; isthmus broad, 



constriction outwardly enlarged ; semi-cells oval ; chlorophyl 



a single mas-; cytioderm smooth, often tinted with yellow, 



lu-ow n or v^\. 



I Hameter l (, -l 5 ". 



Of the Sporangium, Halts writes, " It is large in proportion 

 to the cells, and quadrate with an empty segment of the 

 fronds permanently attached at each corner. Sometimes the 

 fronds couple in a crossed position, when the Bporangium 

 appears variously twisted or distorted." 



I find Bingle specimens of this plant occasionally, but have 

 not had a satisfactory group of them, or fruiting specimens. 



C. tdmidum, Lund. Plate XV, figs. 23; Plate X V I 1 1, fig. 20. 

 ('elU somewhat longer than broad, constriction narrow 

 linear. Semi-cells suboval, rather flat base, apex broad con- 

 vex, with one chlorophyllous mass. Cytioderm punctate 

 and more or less granularly rough in the central part, margin 

 smooth. Plate XVIII, fig. 20, appears to be a variety of this 

 form, coarsely granular. 

 Diameter 20-33 y. 



Pennsylvania, New Jersey, etc. 



In front view this species bears some resemblance to 

 ( '. Pfuueohu, Breb., but differs in being proportionately 



